This hull is of Divinycell cored fiberglass. There are many people who won't have anything to do with a plywood boat. If I don't sell boats then I can't build them and that would suck. The plywood Ariki was completely flat sided. This hull has 3" of crown in the sides amidships. This hull shape is very similar to the 26' Wharrams I have been building in glass. We built over a male mold for several reasons. One is cost. It takes many more boats to amortize the additional costs of a female mold. It is also difficut to work in the bottom of the vessel. It is much easier ergonomicaly to fair the outside than the inside.